Cisco Cisco Email Security Appliance C170 Guia Do Utilizador

Enter a selector. Selectors are arbitrary names prepended to the "_domainkey" namespace, used to help 
support multiple concurrent public keys per sending domain. A selector value and length must be legal 
in the DNS namespace and in email headers with the additional provision that they cannot contain a 
semicolon. 

Select the canonicalization (no forwarding whitespaces or simple).

If you have already created a signing key, select a signing key. Otherwise, skip to the next step. You must 
create (or import) at least one signing key in order to have signing keys to choose from in the list. See 

Enter users (email addresses, hosts, etc.) that will use the domain profile for signing.

Submit and commit your changes. 

At this point (if you have not already) you should enable DomainKeys/DKIM signing on an outgoing 
mail flow policy (see 

). 

If you create both a DomainKeys and DKIM profile, AsyncOS performs both DomainKeys and 
DKIM signing on outgoing mail.

Choose Mail Policies > Signing Profiles. 

In the Domain Signing Profiles section, click Add Profile. 

Enter a name for the profile. 

For the Domain Key Type, choose DKIM. 

Additional options appear on the page. 

Enter the domain name.

Enter a selector. Selectors are arbitrary names prepended to the "_domainkey." namespace, used to help 
support multiple concurrent public keys per sending domain. A selector value and length must be legal 
in the DNS namespace and in email headers with the additional provision that they cannot contain a 
semicolon. 

Select the canonicalization for the header. Choose from the following options:

Relaxed. The “relaxed” header canonicalization algorithm performs the following: header names 
are changed to lowercase, headers are unfolded, linear white spaces are reduced to a single space, 
leading and trailing spaces are stripped.

Simple. No changes to headers are made.

Select the canonicalization for the body. Choose from the following options:

Relaxed. The “relaxed” header canonicalization algorithm performs the following: empty lines are 
stripped at the end of the body, white spaces are reduced to a single space within lines, and trailing 
white spaces are stripped in lines. 

Simple. Empty lines at the end of the body are stripped.